Radium Engineering Universal Air Oil Separator (AOS-R)

This air/oil separator is designed to collect crankcase gasses and allow collected oil to drain back into the engine via gravity. Gasses are then vented to the atmosphere out the top of the AOS VTA. Universal installation.

Radium Engineering Air Oil Separator – Premium Crankcase Ventilation Upgrade

Radium Engineering Air Oil Separators provide a high-performance solution for controlling oil vapor and blow-by in turbo, supercharged, and high-RPM engines. Designed with multi-stage internal baffling, an integrated condenser, and a closed-loop design, Radium’s AOS systems remove oil mist from the PCV stream and return separated oil back to the engine—reducing carbon buildup, preventing detonation, and improving long-term engine reliability.

Built from CNC-machined, anodized aluminum, each Radium AOS is engineered for durability in extreme heat and pressure environments. These systems maintain proper PCV function while keeping the intake tract clean, making them ideal for street, track, and endurance applications. Unlike basic catch cans, Radium’s maintenance-friendly design requires no emptying, ensuring consistent performance with minimal upkeep.

Whether you're running a tuned daily driver or a high-boost track car, Radium’s Air Oil Separator delivers cleaner combustion, more stable crankcase pressure, and improved engine efficiency—all backed by proven motorsport engineering.